Table A3. NOAA Twin Otter Flights Flight Number Flight Description Date 2006 Takeoff-Landing LST 1 Transit from Boulder to Houston with refueling stop in Wichita Falls, Texas; measured ozone south of Dallas and north of Houston 1 Aug 0815-1600 2 Houston/ship channel plume with clean southerly flow 3 Aug 1145-1615 3 Houston/ship channel plume with easterly flow; overflight of Ronald H. Brown 4 Aug 1110-1600 4 Potential stagnation and sea breeze front 5 Aug 0940-1320 5 Sea surface calibration measurements, Ronald H. Brown overflight 8 Aug 1330-1740 6 Ship channel plume; significant interference from convection 10 Aug 1250-1600 7 CALIPSO underflight with Ronald H. Brown; Houston/ship channel plume north of Houston 12 Aug 1130-1720 8 Houston/ship channel plume with clean southerly flow 14 Aug 1220-1830 9 High ozone in Houston area, elevated mixed layer depths, sea breeze incursion 15 Aug 1315-1855 10 Weak ESE winds, high ozone levels in plume N of Houston 16 Aug 1305-1930 11 High ozone level under northeasterly flow, multilayered aerosol structure S and SW of Houston 17 Aug 1150-1750 12 Sampling in Dallas area: instrument and convection problems limited data 21 Aug 0900-1800 13 Instrument test, Ronald H. Brown overflight 22 Aug 0950-1410 14 Instrument test, Houston heat island, Galveston Bay 24 Aug 1435-1820 15 Coordinated mission with King Air and CIRPAS Twin Otter, Ronald H. Brown overpass 28 Aug 1130-1620 16 Ozone plume south of Houston under northerly flow 30 Aug 1220-1845 17 Houston plume under easterly flow, high-ozone day 31 Aug 1105-1710 18 Sea breeze recirculation, high ozone 1 Sep 1310-1820 19 Ozone transport into Texas from the east, high ozone west of Houston 4 Sep 1055-1505 20 MISR overflight, ozonesonde comparison, measurements upwind and downwind of Houston under easterly flow 7 Sep 0920-1620 21 Ozone transported into Texas along Texas-Louisiana border 8 Sep 0910-1510 22 Ozone downwind of Dallas, P-3 and King Air intercomparisons 13 Sep 1120-1750